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loosing oil while running-gctid820759

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  • #1

    loosing oil while running-gctid820759

    We were out a few weeks ago and just happened to notice that the oil pressure gauge was at 0! we immediately shut the engine off and opened the hatch. Oil filled the bilge. We looked everywhere no sign of oil spraying, really could not tell where it was coming from. Added more oil, noted level on stick. started it up, 50+ psi on gauge, while visually looking for leak. Nothing, got a tow back to the dock, had to start up agin to reverse into the slip, all good. after got the boat tied we put it in gear and ran it for 20 minutes while watching the gauge, bilge and engine for any signs of trouble. again nothing.

    My question is could it be running out of the valve covers when the boat is in a forward up position causing the oil to run back faster that the drain can handle causing to leak out of the cover? Maybe a blocked valve housing blockage or loose valve cover?

    HELP! driving me nuts to try to figure out...
    1988, 2655 Ciera Sunbridge. 5.7L, OMC Cobra, 15x15 prop, W/ Camper enclosure.
    Tags: None
    • #2
      With that kind of oil loss there should be a fairly good trail from where it's coming from. If it were valve cover gaskets you'd likely see oil all over the head back there. How's the oil pan and timing chain cover? They can get corroded and leak. Is the drain plug tight? You have a remote oil filter? Check the lines that run to it. Look at the areas where the oil senders/switches are screwed into the block, could leak there under pressure. Also front and rear intake seals, although I don't think it'll puke from there.
      Dave
      Edmonds, WA
      "THE FIX" '93 2556
      Carbureted 383 Vortec-Bravo II
      The Rebuild Of My 2556 https://www.baylinerownersclub.org/f...76?view=thread
      My Misc. Projects       https://www.baylinerownersclub.org/f...56-gctid789773

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        • #3
          We had to buy a long block when we first got the boat. All seals and gaskets new, oil filter is spin on at the block no remote, Oil filter tight. oil sender dry, Oil pan and timing cover looked good when installed. The thing I don't get is that it has been setting for about two weeks and no leak. We have ran it about an hour total while tied to the dock, in gear. nothing! That is why I thought that when running at 2000+ rpm the bow would be up and something was happening then?????
          1988, 2655 Ciera Sunbridge. 5.7L, OMC Cobra, 15x15 prop, W/ Camper enclosure.

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            • #4
              Did you change oil and maybe leave the old filter gasket in place along with the new filter gasket? I

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                • #5
                  "Monmarie" post=822004 wrote:
                  Did you change oil and maybe leave the old filter gasket in place along with the new filter gasket? I
                  +1

                  Also, use an inspection mirror to take a closer look at a three areas: Look for corrosion on the oil pan. Look for corrosion on the dipstick tube. The dipstick tube attaches to the pan with a banjo-type fitting; check that this is not leaking.
                  1999 3788, Cummins 270 "Freedom"
                  2013 Boston Whaler 130 SS
                  Anacortes, WA
                  Isla Verde, PR

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                    • #6
                      I had a oil drain hose on my pan. One time when I drained the oil it loosened up and I didn't know it. It didn't leak until the oil was pretty warm. Running hard then all the oil drained into the bilge. Bilge pump puked it overboard without my knowledge when running over water.

                      It wouldn't leak when oil was cold or even just warm. Check your drain plug.
                      1989 Avanti 3450 Sunbridge
                      twin 454's
                      MV Mar-Y-Sol
                      1979 Bayliner Conquest 3150 hardtop ocean express.
                      Twin chevy 350's inboard
                      Ben- Jamin
                      spokane Washington

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                        • #7
                          My engine had that same banjo style bolt on the pan fitting and I've had to tighten it up several times. If I recall its a big nut, 3/4" or 7/8"...

                          Not easy to reach....
                          88 Four Winns 200 Horizon 4.3 OMC
                          98 Jeep Grand Cherokee 4.0/Selectrac
                          07 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

                          Long Island Sound Region

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                            • #8
                              "Monmarie" post=822004 wrote:
                              Did you change oil and maybe leave the old filter gasket in place along with the new filter gasket? I
                              I have done that...lots of oil comes out fast.

                              Since this is a new engine, check your oil filter and oil lines if it is remote.

                              Did you install the oil filter and/or a remote oil filter?

                              Oil pan?
                              Esteban
                              Huntington Beach, California
                              2018 Element 16
                              Currently looking for 32xx in South Florida
                              Former Bayliners: 3218, 2859, 2252, 1952

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